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UPSC 2009: In the structure of planet Earth, below the mantle, the core is mainly made up of which one of the following ?
(a)Aluminium
(b)Chromium
(c)Iron
(d)Silicon
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Not attemptedCorrect Answer: (c) Iron
Earth’s core (both the liquid outer core and solid inner core) is composed predominantly of an iron-nickel alloy; iron is by far the main constituent, whereas aluminium, chromium and silicon are largely confined to the crust and mantle. ([britannica.com](https://www.britannica.com/place/Earth/The-interior?utm_source=openai))
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Frequently Asked Questions
What is the correct answer to this UPSC 2009 Geography question?▼
The correct answer is option (c): Iron. Watch the detailed video explanation in our Sherlocking Prelims course on UnlockIAS.
Which year was this Physical Geography & Geomorphology question asked in UPSC Prelims?▼
This question was asked in UPSC CSE Prelims 2009, GS Paper 1, as Question 35. It falls under Geography > Physical Geography & Geomorphology.
What is the difficulty level of this UPSC question?▼
This question is rated "easy". It tests basic recall and most well-prepared aspirants should answer it correctly.
How many UPSC Prelims questions have been asked from Physical Geography & Geomorphology?▼
UPSC has asked 25 questions from Physical Geography & Geomorphology (under Geography) across multiple years. Visit the topic page to see the full list and year-wise trends.